According to a report by the Nikkei Asian Review
The report says that Apple is asking its suppliers to review costs of shifting roughly 15% to 30% of production capacity from China to Southeast Asia and Mexico. This comes as the US company sees the risks of reliance on the Chinese market as being too great.
That's hardly surprising. Apple has been one of the more notable names affected by the ongoing trade dispute between US and China as they are an easy target considering their size and market share influence.
The full report can be found here.